This is different from booting after a full shut down. When you turn on your Windows 10 device again, it resumes from hibernate and logs in again. Due to this feature, when you click Shut down, it logs you out and hibernates the kernel and powers off it doesn't really exit Windows. See the following article:Īdditionally, Windows 10 comes with a fast startup/hybrid boot feature. You need to enable it manually if required. Note: The startup sound remained in Windows 10 but it is disabled by default. wav file), and we ran into issues where the sound was unable to play (or got cutoff halfway) because we had shut down the registry or the disk already! We could have spent time rewriting the API but we decided the safest and most performant thing to do was to eliminate the sound altogether." The code we use to play the sound (the PlaySound API) needs to read from the registry (to see what the preferences for this sound were) and from the disk (to read the. However moving the shutdown sound this late started running into other problems. In an interim build of Windows 8 while it was under development, we were able to speed things up considerably by moving the shutdown sound from Explorer.exe (which is running while you’re still logged on) to Logonui.exe (which is the process that shows the "Shutting down" circle.) As part of speeding this up, we experiment a lot with what process is in control of the startup and shutdown sounds. We pay a lot of attention to how quickly the machine powers on, powers off, goes to sleep, resumes from sleep, etc. "We removed these sound events for performance reasons.
There is the official statement from Microsoft which explains the situation.
Even if you assign sounds to the events for 'Exit Windows', 'Windows Logon' and 'Windows Logoff' or try to restore these events using the Registry, they will not play. In Windows 10, Microsoft focused on making Windows boot and shut down faster. Developers of the OS had completely removed the sounds which play at logon, log off and shutdown. Play the Shutdown Sound in Windows 10 Why Windows 10 doesn't play the shutdown sound
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